Tomorrow's flight has been cancelled as planned.

There is a planned blackout tonight, so please come home early.

He is systematically advancing his work.

His thoughts were as we expected.

I am surprised by this unexpected event.

This was truly an unexpected result.

When I hear that song, old memories come to mind.

He likes to take a walk in the park at dusk.

Linear programming is a part of operations research and is used to find the optimal solution.

Paying the urban planning tax is a citizen's duty.